Add support for ol/type attribute

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -3092,13 +3092,17 @@ public class HtmlHelper {
 
                                 int level = 0;
                                 Element list = null;
-                                String ltype = element.attr("x-list-style");
+                                String ltype = element.attr("type");
+                                if (TextUtils.isEmpty(ltype))
+                                    ltype = element.attr("x-list-style");
                                 Element parent = element.parent();
                                 while (parent != null) {
                                     if ("ol".equals(parent.tagName()) || "ul".equals(parent.tagName())) {
                                         level++;
                                         if (list == null)
                                             list = parent;
+                                        if (TextUtils.isEmpty(ltype))
+                                            ltype = parent.attr("type");
                                         if (TextUtils.isEmpty(ltype))
                                             ltype = parent.attr("x-list-style");
                                     }

app/src/main/java/eu/faircode/email/NumberSpan.java

@@ -79,17 +79,21 @@ public class NumberSpan extends BulletSpan {
             number = index + ".";
         else {
             switch (type) {
+                case "a":
                 case "lower-alpha":
                 case "lower-latin":
                     number = Character.toString((char) ((int) 'a' + index));
                     break;
+                case "A":
                 case "upper-alpha":
                 case "upper-latin":
                     number = Character.toString((char) ((int) 'A' + index));
                     break;
+                case "i":
                 case "lower-roman":
                     number = Helper.toRoman(index).toLowerCase(Locale.ROOT);
                     break;
+                case "I":
                 case "upper-roman":
                     number = Helper.toRoman(index);
                     break;